I use the following tablets for reading comics:
- Ainol Novo7 Venus
- Asus MeMO Pad HD 7
- Nexus 7 (2012)
- Nexus 7 (2013)
- Apple iPad 4
For fiction, I've actually done the reverse and switched from mostly LCD-based to e-ink. Now that there are 200+ ppi e-ink readers with front light and wi-fi, I tend to prefer e-ink's matte display over the glossy, reflective displays on my tablets. Also, for some reason backlit LCD tends to give me migraines (or makes my migraine worse) but front-lit e-ink does not.